The Raiders announced the signings of three draft picks on Thursday, including DE Jack Crawford, a fifth-round pick from Penn State.
Also signed were DT Christo Bilukidi, a sixth-round pick from Georgia State, and seventh-round selection Nate Stupar, a linebacker from Penn State.
Crawford notched 6½ sacks as a senior for the Nittany Lions, while Stupar recorded 80 tackles in 13 games (nine starts) as Penn State's strong-side linebacker. Bilukidi had 38 tackles and five sacks as a senior in 2011.